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Finding the Fourth Proportional to 1,997.38, 2,991.99 and 1,628.50

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Solution

The fourth proportional to 1,997.38, 2,991.99 and 1,628.50 is: 2,439.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,997.38 : 2,991.99 = 1,628.50 : x
  2. Step 2: Convert to fraction form
    1,997.38/2,991.99 = 1,628.50/x
  3. Step 3: Cross multiply
    1,997.38x = 2,991.99 × 1,628.50
  4. Step 4: Simplify right side
    1,997.38x = 4,872,455.72
  5. Step 5: Solve for x
    x = 4,872,455.72/1,997.38
  6. Step 6: Final answer
    x = 2,439.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.